diff --git a/addons/account/account_bank_statement.py b/addons/account/account_bank_statement.py
index 40018ec6596..ded29c27e89 100644
--- a/addons/account/account_bank_statement.py
+++ b/addons/account/account_bank_statement.py
@@ -38,12 +38,13 @@ class account_bank_statement(osv.osv):
 
     def write(self, cr, uid, ids, vals, context=None):
         res = super(account_bank_statement, self).write(cr, uid, ids, vals, context=context)
+        account_bank_statement_line_obj = self.pool.get('account.bank.statement.line')
         for statement in self.browse(cr, uid, ids, context):
             seq = 0
             for line in statement.line_ids:
                 seq += 1
                 if not line.sequence:
-                    self.pool.get('account.bank.statement.line').write(cr, uid, [line.id], {'sequence': seq}, context=context)
+                    account_bank_statement_line_obj.write(cr, uid, [line.id], {'sequence': seq}, context=context)
         return res
 
     def button_import_invoice(self, cr, uid, ids, context=None):
@@ -381,13 +382,14 @@ class account_bank_statement(osv.osv):
 
     def button_cancel(self, cr, uid, ids, context=None):
         done = []
+        account_move_obj = self.pool.get('account.move')
         for st in self.browse(cr, uid, ids, context):
             if st.state=='draft':
                 continue
             ids = []
             for line in st.line_ids:
                 ids += [x.id for x in line.move_ids]
-            self.pool.get('account.move').unlink(cr, uid, ids, context)
+            account_move_obj.unlink(cr, uid, ids, context)
             done.append(st.id)
         return self.write(cr, uid, done, {'state':'draft'}, context=context)
 
diff --git a/addons/account/report/account_tax_report.py b/addons/account/report/account_tax_report.py
index d968ee9029e..c96b380868b 100644
--- a/addons/account/report/account_tax_report.py
+++ b/addons/account/report/account_tax_report.py
@@ -20,7 +20,6 @@
 ##############################################################################
 
 import time
-import copy
 
 import rml_parse
 from report import report_sxw
diff --git a/addons/account/wizard/account_vat.py b/addons/account/wizard/account_vat.py
index 0c33517d428..e464a9cddd4 100644
--- a/addons/account/wizard/account_vat.py
+++ b/addons/account/wizard/account_vat.py
@@ -39,7 +39,7 @@ class account_vat_declaration(osv.osv_memory):
         company_obj = self.pool.get('res.company')
         user = user_obj.browse(cr, uid, uid, context=context)
         if user.company_id:
-    	    return user.company_id.id
+            return user.company_id.id
         else:
             return company_obj.search(cr, uid, [('parent_id', '=', False)])[0]